Extreme poverty trend

Historians have tried to estimate the extreme poverty rate in 1820 using different methods, and their results differ widely. Gapminder[9] roughly estimates that 85 percent of the world population lived on Level 1 in 1800. The post-1980 data comes from PovcalNet. Gapminder[9] has extended the trend to 2017 using PovcalNet and IMF[1] forecasts. The numbers in the text on the reductions in extreme poverty in China, India, Latin America, and elsewhere come from World Bank[5].

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